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  <title>简介</title>

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</div><hr /><div id="intro.dio" class="preface">
  <h1 class="title">简介</h1>
  <p class="para">
   PHP supports the direct io functions as described in the Posix
   Standard (Section 6) for performing I/O functions at a lower
   level than the C-Language stream I/O functions
   (<span class="function"><a href="function.fopen.html" class="function">fopen()</a></span>, <span class="function"><a href="function.fread.html" class="function">fread()</a></span>,..).  The use
   of the DIO functions should be considered only when direct 
   control of a device is needed.  In all other cases, the standard
   <a href="book.filesystem.html" class="link">filesystem</a> functions are more
   than adequate. 
  </p>
  <blockquote class="note"><p><strong class="note">Note</strong>: 
   <p class="para">
    此扩展已被移至
<a href="http://pecl.php.net/" class="link external">&raquo;&nbsp;PECL</a> 资源库且不再与 PHP 捆绑。5.1.0.
   </p>
  </p></blockquote>
  <p class="para">
   This extension is only available on Windows Platforms as of PHP 5.0.0
  </p>
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